/*const getSum = (a:number, b:number):number => {
    return a + b
}*/
/*type getSumFnType = (a: number, b: number) => number
const getSum: getSumFnType = (a: number, b: number): number => {
    return a + b
}
const result: number = getSum(10, 20)
console.log(result)*/
var fun = function (a) {
    console.log("fun函数执行了");
};
fun();
